One last chance to say it

There's one tiny little gap in the Universe left, just about to close, and it takes a lot of power to send this projection. I'm in orbit around a super nova. - Tenth Doctor, "Doomsday"

Here's a unit of measurement you may not have met before: the foe, also known as the Bethe. It's the observable energy a supernova typically releases. It's equal to 1044 joules or 1051 ergs. Or about the amount of power needed to transmit a hologram of the Tenth Doctor to Rose Tyler in a parallel universe.

Rose and the Tenth Doctor in front of a sun under a quote reading, "I'm burning up the sun just to say goodbye" on the front of this this ladies' cut, navy blue tank. 95% rayon / 5% Spandex. Features tank-style straps and a racerback. Machine wash cold. Tumble dry low or lay flat to dry. Imported. Listed in juniors sizing.